Curve GXR4 (aka Kevin) Frame
What the checker says80will not fit4check before you buy62worth knowing
Run variant by variant through the gravel bike builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.
Checked against 807 verified gravel bike parts in this catalog. 650 produced no finding of any kind.
Will not fit
- Will not fiterror · Dropper PostDropper too big: Curve GXR4 (aka Kevin)'s seat tube is 27.2mm but Wolf Tooth Resolve is 30.9mm - a bigger post cannot fit a smaller tube. On 4 of the 40 verified dropper posts in this catalog.
- Will not fiterror · Dropper PostDropper too big: Curve GXR4 (aka Kevin)'s seat tube is 27.2mm but Wolf Tooth Resolve is 31.6mm - a bigger post cannot fit a smaller tube. On 4 of the 40 verified dropper posts in this catalog.
- Will not fiterror · Rear WheelRear axle mismatch: Curve GXR4 (aka Kevin) takes a 12x142 hub but Ritchey WCS Zeta GX Boost is 12x148. On 2 of the 71 verified rear wheels in this catalog.
Rg bb shell, Bottom Bracket. 29 more findings from the same check, on up to 1 of the 30 verified bottom brackets each.
Rg seatpost, Dropper Post. 15 more findings from the same check, on up to 1 of the 40 verified dropper posts each.
Rg seatpost, Seatpost. 15 more findings from the same check, on up to 1 of the 33 verified seatposts each.
Rg brake mount, Rear Caliper. 11 more findings from the same check, on up to 1 of the 27 verified calipers each.
Rg steerer, Fork. 6 more findings from the same check, on up to 1 of the 31 verified forks each.
Rg rear axle, Rear Wheel. 1 more finding from the same check, on up to 1 of the 71 verified rear wheels each.
Open a variant in the builder to see the ones that apply to your own parts.
Check before you buy
- Check before you buywarning · Rear TireTire clearance: 55mm tire is wider than Curve GXR4 (aka Kevin)'s 50mm frame max. On 4 of the 142 verified tires in this catalog.
- Check before you buywarning · Rear TireTire clearance: 56mm tire is wider than Curve GXR4 (aka Kevin)'s 50mm frame max. On 2 of the 142 verified tires in this catalog.
- Check before you buywarning · Rear TireTire clearance: 60mm tire is wider than Curve GXR4 (aka Kevin)'s 56mm frame max. On 2 of the 142 verified tires in this catalog.
- Check before you buywarning · Rear TireTire clearance: 60mm tire is wider than Curve GXR4 (aka Kevin)'s 50mm frame max. On 1 of the 142 verified tires in this catalog.
Worth knowing
- Worth knowinginfo · ForkHeadset: mounting the Fox 32 Taper-Cast in Curve GXR4 (aka Kevin) needs a headset - many frames ship with one; pick one here if yours does not. On 2 of the 31 verified forks in this catalog.
- Worth knowinginfo · ForkHeadset: mounting the RockShox Rudy Ultimate XPLR in Curve GXR4 (aka Kevin) needs a headset - many frames ship with one; pick one here if yours does not. On 2 of the 31 verified forks in this catalog.
- Worth knowinginfo · ForkHeadset: mounting the RockShox Rudy XL Ultimate in Curve GXR4 (aka Kevin) needs a headset - many frames ship with one; pick one here if yours does not. On 2 of the 31 verified forks in this catalog.
- Worth knowinginfo · ForkHeadset: mounting the RockShox Rudy XL in Curve GXR4 (aka Kevin) needs a headset - many frames ship with one; pick one here if yours does not. On 2 of the 31 verified forks in this catalog.
- Worth knowinginfo · ForkHeadset: mounting the RockShox Rudy XPLR (Base) in Curve GXR4 (aka Kevin) needs a headset - many frames ship with one; pick one here if yours does not. On 2 of the 31 verified forks in this catalog.
Rg bb advisory, Crankset. 33 more findings from the same check, on up to 1 of the 33 verified cranksets each.
Rg headset advisory, Fork. 21 more findings from the same check, on up to 1 of the 31 verified forks each.
Rg xplr udh, Rear Derailleur. 3 more findings from the same check, on up to 1 of the 20 verified rear derailleurs each.
Open a variant in the builder to see the ones that apply to your own parts.
$3,026.00 MSRP
What the maker states
- Rear axle
- 12x142
- Bottom bracket
- Bottom-bracket shell t47-86
- Seatpost
- Takes a 27.2 mm seatpost
- Wheel sizes
- Built for 700c and 650b wheels
- Brake system
- Disc-flat
- Brake mount
- Flat-mount
The rest of what the maker states5 stated·16 not published
- Steerer Tapered 1.125-1.5.
- Tire up to 50 mm on 700c and 56 mm on 650b (maker-stated maximum).
- Front-derailleur mount braze-on.
- Sold as a frame only.
- titanium construction.
16 further fields the checker looks for are not published by Curve, so we leave them blank rather than estimate them, and those 16 checks stay silent on this frame. They are maximum tire basis, maximum rear rotor, minimum rear rotor, head tube upper, head tube lower, headset included, headset included model, headset included part, maximum fork travel, minimum fork travel, design fork travel, fork travel hard, dropout type, udh, drive mode and gearbox mount. Each is recorded as “not stated by the maker (not checked)”.
Source: the maker’s page. Last checked 2026-09-23.
Checked against
The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.
- 3T Fango LTD (Fork) Worth knowing
- 8bar Gravel Carbon Disc Fork v2 (Fork) Worth knowing
- 9point8 Fall Line R (Dropper Post) Will not fit
- Acros ZS44/28.6 | EC44/40 Headset (Headset) No conflicts found
- BikeYoke Divine SL Rascal (Dropper Post) Will not fit
- BMC URS 01 D-Shaped Seatpost (Seatpost) Will not fit
6 of 455 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.